A large northwest swell today is expected to bring surf up to 25 feet along affected shores of most islands and prompted forecasters at the National Weather Service to post a high surf warning early this morning.

The high surf warning is now in effect through 6 a.m. Friday.

Weather officials expect surf up to 20 to 25 feet along the north and west shores of Kauai County and Molokai, and along the north shores of Oahu and Maui.

The dangerous surf is expected to build from this afternoon through this evening.

Weather officials warned of hazardous currents and breaking waves. “Large breaking surf, significant shorebreak and dangerous currents make entering the water very hazardous. Anyone entering the water could face significant injury or death.”